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6E-168 EMISSION AND ELECTRICAL DIAGNOSIS Measure Resistance at Engine Coolant Temperature (ECT) Sensor Caution: Resistance value Notice: Connector No Signal 1 Thermistor for engine 2 Thermistor for engine 3 Thermistor for meter Legend 1. Circuit tester 3. Engine coolant temperature sensor 2. Remove engine wire harness 4. Measure resistance between connector pin Inspection Point Resistance Value Temperature on sensor Reference Connector Pin No. 3 pin Black 1 ←→ 3 ∞ — Thermistor for ENGINE ←→ Thermistor for meter 1 ←→ 2 2.5 (k Ω) 20 °C (68°F) Thermistor for ENGINE 247 ( Ω) 90 °C (194°F) 1 ←→ Body ∞ — Thermistor for ENGINE ←→ Body 2 ←→ 3 ∞ — Thermistor for ENGINE ←→ Thermistor for meter 3 ←→ Body 146.6 ( Ω) 60 °C (140°F) Thermistor for meter ENGINE 2 ←→ Body ∞ — Thermistor for ECM ←→ Body N6A1162E |